Which term describes small sound contrasts that can change meaning within a language, such as between p and b in English?

• A. Phonemic
• B. Procedural knowledge
• C. Obligatory contexts
• D. Negotiation of form

Answer: (A)

Small sound contrasts that can change meaning in a language are described by phonemes. In English, the sounds p and b form a meaningful distinction: swapping them in words like pat and bat changes the word’s meaning, showing that these sounds belong to different phonemes. Phonemes are the abstract categories that encode differences in meaning; the actual sounds we hear can vary (aspiration, timing, etc.) but as long as those variations don’t create new meanings, they’re just allophones of the same phoneme. The other terms don’t describe how sound contrasts map to meaning—procedural knowledge is about doing tasks, obligatory contexts are about where forms must occur, and negotiation of form relates to interactional adaptation, not phonemic contrast.